2D vector (often used to store positions, sizes, etc.)

4D vector (often used to store floating-point colors)

2D vector (half-size integer)

Simplified structure to mimic a Document model

Helper to build glyph ranges from text/string data

Runtime data for multiple fonts, bake multiple fonts into a single texture, TTF/OTF font loader

1D vector (this odd construct is used to facilitate the transition between 1D and 2D, and the maintenance of some branches/patches)

Storage for one type registered in the .ini file